map move 2.swift

//
//  MapSampleViewController.swift
//  verytmp
//
//  Created by Don Mag on 5/11/17.
//  Copyright © 2017 DonMag. All rights reserved.
//

import UIKit
import MapKit

class MapSampleViewController: UIViewController {
	
	var panView: UIView!
	var mapView: MKMapView!
	
	var regionSize = 1000.0
	
	
	var startPoint = CGPoint.zero
	var startCoord = CLLocationCoordinate2D(latitude: 48.8582, longitude: 2.2945)
	
	override func viewDidLoad() {
		super.viewDidLoad()
		
		let pv = UIView()
		let mv = MKMapView()
		
		
		pv.translatesAutoresizingMaskIntoConstraints = false
		mv.translatesAutoresizingMaskIntoConstraints = false
		
		self.view.addSubview(pv)
		self.view.addSubview(mv)
		
		
		mv.leadingAnchor.constraint(equalTo: self.view.leadingAnchor, constant: 8.0).isActive = true
		mv.trailingAnchor.constraint(equalTo: self.view.trailingAnchor, constant: -8.0).isActive = true
		mv.bottomAnchor.constraint(equalTo: self.view.bottomAnchor, constant: -8.0).isActive = true
		
		mv.heightAnchor.constraint(equalTo: mv.widthAnchor).isActive = true
		
		pv.widthAnchor.constraint(equalTo: mv.widthAnchor).isActive = true
		pv.centerXAnchor.constraint(equalTo: mv.centerXAnchor).isActive = true
		pv.bottomAnchor.constraint(equalTo: mv.topAnchor, constant: -16).isActive = true
		
		pv.heightAnchor.constraint(equalToConstant: 60.0).isActive = true
		
		pv.backgroundColor = .blue
		
		
		let pan = UIPanGestureRecognizer(target: self, action: #selector(self.didPan(_:)))
		pv.addGestureRecognizer(pan)
		
		
		panView = pv
		mapView = mv
		
		let region = MKCoordinateRegionMakeWithDistance(startCoord, regionSize, regionSize)
		mapView.setRegion(region, animated: false)
		
	}
	
	
	func didPan(_ sender: Any) {
		
		if let recognizer = sender as? UIPanGestureRecognizer {
			
			let trans = recognizer.translation(in: recognizer.view)
			
			switch recognizer.state {
			case .began:
				startPoint = trans
				startCoord = mapView.centerCoordinate
				break
				
			case .changed:
				let delta = startPoint.x - trans.x
				let newCoord = CLLocationCoordinate2D(latitude: startCoord.latitude + Double(delta / 10000), longitude: startCoord.longitude)
				let region = MKCoordinateRegionMakeWithDistance(newCoord, regionSize, regionSize)
				self.mapView.setRegion(region, animated: false)
				break
				
			default:
				break
				
			}
			
		}
		
	}
	
}